Many companies leak tons of information on their website; look up the CEO/President's name, find someone on Linked-in that is a new hire, guess their email based on whatever format the company uses (first.last@company, etc) and send a decent looking email or call.

It's pretty darn advanced, and can extend to texts, etc. If you don't know 'how your president talks' you can easily be bamboozled (we cover it in onboarding now, and have identified people they can always go to with questions).